olsoctcp versus tcp

We are running Informix 5.02.UC1 backend with ISQL 4.11.UC1 and I-Net 5.02.UC6 on a Sparc Station 5, and we have an sqlhosts file configured as follows: . . . myengine tcp mymach star1 myengineol olsoctcp mymach star1 When we run the following begin work; insert into mydb@myengine:mytable values(0, "abc", "abc", "abc", "n", "ab" ); commit work; the process hangs, but when we run begin work; insert into mydb@myengineol:mytable values(0, "abc", "abc", "abc", "n", "ab" ); commit work; it completes successfully. Can anyone explain why this happens? Any words of wisdom on the difference between olsoctcp and tcp? Would it be save to change the tcp to olsoctcp (there are other applications currently running the machine and accessing the databases via this alias.) bilbo:/home/bilbo/timh/tmp>